In the past few years, erotic game companies have developed and/or released a slew of highly interactive peripherals (here, here, and, uh, here). The latest is from Tokyo-based adult game maker Waffle.

Currently in development, the electric-powered fleshlight-like peripheral moves in concert with the in-game action, which is something we've seen before. (These products are even more niche than erotic games.)

I guess the big innovation is that the hands-free peripheral can be moved to a variety of angles (as you can see in the GIF below) and has a suction cup, allowing people to stick it anywhere.